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On design of physical random access channel in high-speed railway LTE systems
  • 期刊名称：Chinese Science Bulletin
  • 时间：2014.12
  • 页码：5042-5050
  • 分类：TN92[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]电子科技大学通信抗干扰国家级重点实验室,成都610054, [2]信息感知技术协同创新中心,西安710071
  • 相关基金：国家863计划（2015AA8098083C）,国家自然科学基金（61471100,61101090）,中央高校基金（ZYGX2015J012）
  • 相关项目：地面超高移动性宽带无线通信关键问题
作者： Gang Wu|Hang Yuan|Wei Guo|Su Hu|Shaoqian Li|
关键词： 多天线信道估计, 复杂电磁环境, 频谱受限, 序列设计, Multiple antenna channel estimation, Complex electromagnetic environment, Limited spectrum, Sequence design
中文摘要：

对于基于认知无线电架构的多天线信道估计技术，由于传统零相关序列是在全部频谱可用前提下设计的，在复杂电磁环境的频谱限制下，传统零相关序列部分频域元素发生变化，且不再满足原始序列的周期相关特性，因此不能直接应用于复杂电磁环境的多天线信道估计。该文介绍了多天线通信系统的信道估计算法并指出对理想序列的要求，然后针对复杂电磁环境，即在存在频谱空穴的条件下，联合优化频谱受限和良好周期相关程度两大评价指标，设计出适用的序列集合，作为训练序列应用到认知无线电系统的信道估计算法中，仿真结果验证了新序列集合的有效性。

英文摘要：

For channel estimation technology of multiple antenna communication system based on cognitive radio architecture, traditional zero correlation zone sequences （which assume the availability of the entire spectral band） can not be used because their orthogonality will be destroyed by the spectrum hole constraint. This paper introduces the channel estimation algorithm in multiple antenna communication system and points out the requirement of the ideal sequence set, then on complex electromagnetic environment, i.e., under the condition of the existence of spectrum holes, joints optimization evaluation indexes of limited spectrum and good cycle correlation degree, designs a suitable sequence set, which can be applied to the channel estimation algorithm of cognitive radio system. The simulation results verify the effectiveness of the new sequence set.

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